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AS 2221.1-1979
$47.81
Methods for measurement of airborne sound emitted by compressor units including primemovers and by pneumatic tools and machines, Part 1: Engineering method for measurement of airborne sound emitted by compressor/primemover units intended for outdoor use
Describes a method for determining mean sound level and mean band pressure level of airborne sound. It is an engineering method which requires a controlled environment for repeatable results.
Table of contents
Header
About this publication
PREFACE
1 SCOPE
2 APPLICATION
3 DEFINITION
4 INSTRUMENTATION
4.1 Sound Level Meter
4.2 Alternative Systems
4.3 Spectrum Analysis
4.4 Calibration
5 OPERATING CONDITIONS
5.1 Condition of Machine
5.2 Measurement Conditions
6 TEST ENVIRONMENT
7 PROCEDURE FOR SOUND MEASUREMENT
7.1 Background Sound
7.2 Machine Sound
7.2.1 Measurements
7.2.2 Microphone locations
7.2.3 Measuring techniques
8 CALCULATION OF MEAN SOUND LEVEL AND MEAN BAND PRESSURE LEVEL
